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Is it possible to create a Power BI report from more than 1 SSAS Tabular DQ models ?
If yes please let me know the steps.
You can add more than one SSAS Tabular model in a Power BI Report, but you cannot create New relationships because it is a direct connect to source. This limits the visuals to just one model. If you add measures or dimension attributes from unrelated table, then the results are going to be odd and not correct.
Power BI started something called composite models (mixing imported data with DirectQuery) but it is not completely support in most real world scenarios, yet. https://learn.microsoft.com/en-us/power-bi/transform-model/desktop-composite-models
I am assuming that Microsoft is going to improve this in the future.
You might also want to read about Common Data Service and Certificated Data Sets in the Power BI service.